uploadProgress signal emitted 0/0 with long delay

yasen

uploadProgress signal not emitted real upload progress. When i upload large file, progress emited 3 times, example:
16384 / 10175221
6766592 / 10175221
10175221 / 10175221
but signal 0 / 0 emited with long delay. I think that the signal is emitted when the file is uploaded to some intermediate buffer, and not to the remote server. How to get real upload progress?
Code example:

QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);

QHttpPart profileIdPart;
profileIdPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"profile_id\""));
profileIdPart.setBody(GlobalsArgs::profileID.toUtf8());
multiPart->append(profileIdPart);

QHttpPart fileTypePart;
fileTypePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file_type\""));
fileTypePart.setBody(fileT.toUtf8());
multiPart->append(fileTypePart);

fileObj = new QFile(file);
QHttpPart imagePart;
imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file\"; filename=\"" + fileObj->fileName() +"\""));
imagePart.setHeader(QNetworkRequest::ContentLengthHeader, fileInfo.size());
imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/octet-stream"));
fileObj->open(QIODevice::ReadOnly | QIODevice::Unbuffered);
imagePart.setBodyDevice(fileObj);
fileObj->setParent(multiPart);
multiPart->append(imagePart);

QUrl url(GlobalsArgs::uploadURL + "/files/");
QByteArray headerRowName;
headerRowName.append(" Bearer " + GlobalsArgs::uploadToken);

QNetworkRequest request(url);
request.setRawHeader("Authorization", headerRowName);
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::AlwaysNetwork);
request.setAttribute(QNetworkRequest::DoNotBufferUploadDataAttribute, true);

manager = new QNetworkAccessManager(this);
reply = manager->post(request, multiPart);
multiPart->setParent(reply);

connect(manager, SIGNAL(finished(QNetworkReply*)),
        this, SLOT   (uploadDone(QNetworkReply*)));

connect(reply, SIGNAL(uploadProgress(qint64, qint64)),
        this, SLOT  (uploadProgress(qint64, qint64)));

SGaist

Hi and welcome to devnet,

You should add:

Which version of Qt
Which OS you are running your application
Whether it happens with all the files, if not, what is the size trigger
What kind of server do you have on the other side

yasen

@SGaist ty for reply,

Version Qt: 5.11.2
OS version: Windows 7 (64bit)
Happens with all files types and size
server side: node.js (express.js)

yasen

no thoughts?

SGaist

Well, I would test against another server, I haven't had that problem yet.

You might also want to update to Qt 5.12.2.

yasen

Qt 5.12.2 same problem

yasen

Tested on another server, everything works fine

Solved uploadProgress signal emitted 0/0 with long delay